package com.itheima.config;

import com.baomidou.mybatisplus.extension.plugins.MybatisPlusInterceptor;
import com.baomidou.mybatisplus.extension.plugins.inner.PaginationInnerInterceptor;
import com.itheima.utils.JacksonObjectMapper;
import lombok.extern.slf4j.Slf4j;
import org.springframework.context.annotation.Bean;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.stereotype.Component;
import org.springframework.web.multipart.commons.CommonsMultipartResolver;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport;

import java.util.List;

//Consider defining a bean of type 'com.itheima.reggie.service.SetmealService' in your configuration.
@Component
@Slf4j
public class WebMvcConfig extends WebMvcConfigurationSupport {

    /**
     * 设置静态资源映射
     * @param registry
     */
   @Override
   protected void addResourceHandlers(ResourceHandlerRegistry registry){
          log.info("开始进行静态资源映射");
          registry.addResourceHandler("/backend/**").addResourceLocations("classpath:/backend/");
          log.info("/backend/**","classpath:/backend/");
          registry.addResourceHandler("/front/**").addResourceLocations("classpath:/front/");
          log.info("/front/**","classpath:/front/");

    }

    /**
     * 分页拦截器
     * @return
     */
    @Bean
    public MybatisPlusInterceptor mybatisPlusInterceptor(){
        //1. 创建拦截器对象
        MybatisPlusInterceptor mpi = new MybatisPlusInterceptor();

        //2.添加分页拦截器
        mpi.addInnerInterceptor(new PaginationInnerInterceptor());

     return mpi;
    }

    /**
     *
     * 就是将Long的数据 转化成字符串
     * 扩展mvc框架的消息转换器
     * @param converters
     */
    @Override
    protected void extendMessageConverters(List<HttpMessageConverter<?>> converters) {
        log.info("扩展消息转换器...");
        //创建消息转换器对象
        MappingJackson2HttpMessageConverter messageConverter = new MappingJackson2HttpMessageConverter();
        //设置对象转换器，底层使用Jackson将Java对象转为json
        messageConverter.setObjectMapper(new JacksonObjectMapper());
        //将上面的消息转换器对象追加到mvc框架的转换器集合中
        converters.add(0,messageConverter);
    }

    /**
     * 文件上传解析器
     * @return
     */
    @Bean("multipartResolver")
    public CommonsMultipartResolver commonsMultipartResolver(){
        CommonsMultipartResolver cmr = new CommonsMultipartResolver();
        cmr.setMaxUploadSize(1024*1024*50); //最大文件50M
        cmr.setMaxUploadSizePerFile(1024*1024*10);//每个文件尺寸为10

      return cmr;
    }




}
